INTRODUCTION
INCH FLANGED HARDWARE
NOM-
INAL
SIZE
SAE GRADE 5 BOLT and
NUT
SAE GRADE 8 BOLT and
NUT
LOCKNUT
GrF W/ Gr5
BOLT
LOCKNUT
GrG W/ Gr8
BOLT
UNPLATED
or PLATED
SILVER
PLATED
W/ZnCr
GOLD
UNPLATED
or PLATED
SILVER
PLATED
W/ZnCr
GOLD
1/4
9 N·m
(
80 lb in
)
12 N·m
(
106 lb
in
)
13 N·m
(
115 lb
in
)
17 N·m
(
150 lb
in
)
8 N·m
(
71 lb in
)
12 N·m
(
106 lb
in
)
5/16
19 N·m
(
168 lb
in
)
25 N·m
(
221 lb
in
)
26 N·m
(
230 lb
in
)
35 N·m
(
310 lb
in
)
17 N·m
(
150 lb
in
)
24 N·m
(
212 lb
in
)
3/8
33 N·m
(
25 lb
ft
)
44 N·m
(
33 lb
ft
)
47 N·m
(
35 lb
ft
)
63 N·m
(
46 lb
ft
)
30 N·m
(
22 lb ft
)
43 N·m
(
32 lb ft
)
7/16
53 N·m
(
39 lb
ft
)
71 N·m
(
52 lb
ft
)
75 N·m
(
55 lb
ft
)
100 N·m
(
74 lb
ft
)
48 N·m
(
35 lb ft
)
68 N·m
(
50 lb ft
)
1/2
81 N·m
(
60 lb
ft
)
108 N·m
(
80 lb
ft
)
115 N·m
(
85 lb
ft
)
153 N·m
(
113 lb ft
)
74 N·m
(
55 lb ft
)
104 N·m
(
77 lb
ft
)
9/16
117 N·m
(
86 lb
ft
)
156 N·m
(
115 lb ft
)
165 N·m
(
122 lb ft
)
221 N·m
(
163 lb ft
)
106 N·m
(
78 lb ft
)
157 N·m
(
116 lb
ft
)
5/8
162 N·m
(
119 lb
ft
)
216 N·m
(
159 lb ft
)
228 N·m
(
168 lb ft
)
304 N·m
(
225 lb ft
)
147 N·m
(
108 lb
ft
)
207 N·m
(
153 lb
ft
)
3/4
287 N·m
(
212 lb
ft
)
383 N·m
(
282 lb ft
)
405 N·m
(
299 lb ft
)
541 N·m
(
399 lb ft
)
261 N·m
(
193 lb
ft
)
369 N·m
(
272 lb
ft
)
7/8
462 N·m
(
341 lb
ft
)
617 N·m
(
455 lb ft
)
653 N·m
(
482 lb ft
)
871 N·m
(
642 lb ft
)
421 N·m
(
311 lb
ft
)
594 N·m
(
438 lb
ft
)
1
693 N·m
(
512 lb
ft
)
925 N·m
(
682 lb ft
)
979 N·m
(
722 lb ft
)
1305 N·m
(
963 lb ft
)
631 N·m
(
465 lb
ft
)
890 N·m
(
656 lb
ft
)
IDENTIFICATION
Inch Bolts and free-spinning nuts
20083682
3
Grade Marking Examples
SAE Grade Identification
1
Grade 2 - No Marks
4
Grade 2 Nut - No Marks
2
Grade 5 - Three Marks
5
Grade 5 Nut - Marks
120 °
Apart
3
Grade 8 - Five Marks
6
Grade 8 Nut - Marks
60 °
Apart
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